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sashaice [31]
3 years ago
12

Help please!!!!!!!

Mathematics
1 answer:
ASHA 777 [7]3 years ago
6 0
<span>This would be a bell curve with a z-score of greater than +2.00, since 3 minutes is exactly two standard deviations greater than the mean of 2.00. Looking at a z-score table for the proportion of the curve that lies in the 1-tailed area greater than 2.00, we find that the value is .0228. This would be the probability that the conversation is over three minutes: 0.0228 or 2.28%.</span>
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HURRY UP PLEASE !!
IRISSAK [1]

Answer:

<h2>The x-interecepts are 5.6 and -1.4, approximately.</h2>

Step-by-step explanation:

The given equation is

5x^{2} -21x=39

Where a=5, b=-21 and c=39, let's use the quadratic formula

x_{1,2}=\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a} =\frac{-(-21) (+-)\sqrt{(-21)^{2} -4(5)(-39)} }{2(5)}\\ x_{1,2}=\frac{21(+-)\sqrt{441+780} }{10}=\frac{21(+-35)}{10}\\x_{1}=\frac{21+35}{10}=\frac{56}{10} \approx 5.6\\  x_{2}=\frac{21-35}{10}=\frac{-14}{10} \approx -1.4

Therefore, the x-interecepts are 5.6 and -1.4, approximately.

7 0
3 years ago
I keep being bullied and they reported all my questions u ppl are rude u have no life
Novay_Z [31]

Answer: I acculy hate when ppl think they can spam report all the questions ppl have nut when ppl do it to them they mad so just do it back see how they feel to be reported in all of there questions

Step-by-step explanation:

5 0
3 years ago
Layla spent 25 minutes on
yKpoI14uk [10]

Answer:

D

Step-by-step explanation:

25+30= time Layla spent. 3x time layla spent = elijah's time

4 0
3 years ago
Read 2 more answers
How do I show the workings out for subtraction 1.56 - 5.20 =
pogonyaev

The Soluton:

Given:

1.56-5.20

We are asked to evaluate the given expression.

Explanation:

Since the number you are taking away is greater than thenumber that you want to taake it away from, we have to swap the numbers and then the result will be a negative number.

Therefore, the correct answer is -3.64

6 0
1 year ago
Find each measurement indicated. Round your answers to the nearest tenth. Please show work. Part 1​
timama [110]

9514 1404 393

Answer:

  1. 33.0 m
  2. 26.1 mi
  3. 28.0 mi
  4. 33.0 mi

Step-by-step explanation:

In each of these Law of Sines problems, you are given side a and angles B and C and asked for side c (problems 1, 3, 4) or side b (problem 2). The solution is basically the same for each:

Find the missing angle. Find the side from ...

  c = a·sin(C)/sin(A)

__

1. angle A = 180°-89°-58° = 33°

  c = (18 m)sin(89°)/sin(33°) ≈ 33.0 m

__

2. angle C = 180°-13°-17° = 150°

  b = (58 mi)sin(13°)/sin(150°) ≈ 26.1 mi

__

3. angle A = 180°-61°-89° = 30°

  c = (16 mi)sin(61°)/sin(30°) = 28.0 mi

__

4. angle A = 180°-39°-127° = 14°

  c = (10 mi)sin(127°)/sin(14°) ≈ 33.0 mi

7 0
3 years ago
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